Mozilla/Firefox XPCOM tests

Most of these will not work unless you turn on the signed.applets.codebase_principal_support
setting. I will not help you do that. Google it yourself.

Image Map Highlighter
This page needs extra permissions to do cross-site scripting.
It loads up a webpage and overlays the clickable portions of client-side image
maps using SVG. (Too bad the overlay isn't clickable. I never got that far.)

Anyway, some interesting examples (not all of them work right, which is why
I omit the word 'good'):

Hovering over them in Mozilla or Firefox should popup a list of interfaces
supported by each class. Red classes crash Firefox. I filed a bug (see below),
but the mozilla people didn't consider it a bug and refused to fix it.